It's a thick, clumpy, white discharge. it doesn't have a fishy smell but it's not a normal smell. most noticeable in toilet after bowel movement?

Mucus with stool: Mucus discharge occurs in up to 50% of patients with irritable bowel syndrome, with or without pain. Mucus may also be produced in response to partial obstruction, chronic constipation, rectal dysfunction, infection, ; even from secretory villous tumors of the rectum. At the very least stool studies ; probably a sigmoidoscopy should be considered, but a more extensive evaluation may be warranted.